class Settings:
    """存储<<外星人入侵>>的所有设置的类"""

    def __init__(self):
        """初始化游戏的设置"""
        # 屏幕设置
        self.screen_width = 1200
        self.screen_height = 800
        self.bg_color = (230, 230, 230)

        # 飞船的设置
        self.ship_speed_factor = 1.5  # 飞船速度
        self.ship_limit = 3

        # 子弹设置
        self.bullet_speed_factor = 3
        self.bullet_width = 300
        self.bullet_height = 15
        self.bullet_color = 60, 60, 60
        self.bullets_allowed = 3

        # 外星人设置
        self.alien_speed_factor = 1
        self.fleet_drop_speed = 40
        # fleet_direction为表示向右移,为-1表示向左移
        self.fleet_direction = -1
